Choose the correct options

1. We [had already visited|already visited|were visiting] several cities by the time you
   [had decided|decided|were deciding] to join us.
2. The sun [was shining|had shone|shone] and everyone was happy.
3. I [had done|was doing|did] my homework when my friend Rick [had called|called|was called] me.
4. He [was saving up|saved up|had saved up] a good amount of money before he [was going|had gone|went] abroad.
5. I [was talking|talked|had talked] to her classmates this morning at about 10 o'clock.
6. Lily [had introduced|introduced|was introducing] herself to the class and [had answered|was answering|answered] her new classmates' questions.